Nono, a young girl from the country, moves to the big city in order to achieve her dream: becoming a space pilot!

Mars' Space Force isn't happy about space monsters showing up on their doorstep, and they blame the Fraternity.

Tycho wrecks her Buster Machine, ruining her chance to reach top. Not to worry--there's another Buster Machine in the works.

Nono's despair grows as her certainty that she'll get a Buster Machine fades.

After the Titan incident, the world has changed. Topless are a disease, and humanity's last hope for salvation is the least likely person in the Sol System.

With the survival of humanity itself at stake, one desperate plan remains: the sacrifice of the Earth, to strike at the beast! But where is Buster Machine #7?